# -*- coding: iso-8859-1 -*-
"""
    MoinMoin - "sitemap" action

    Generate a URL list of all your pages (using google's sitemap XML format).

    @copyright: 2006 by Thomas Waldmann, MoinMoin:ThomasWaldmann
    @license: GNU GPL, see COPYING for details.
"""
import time
from MoinMoin import config, wikiutil
from MoinMoin.util import MoinMoinNoFooter

datetime_fmt = "%Y-%m-%dT%H:%M:%S+00:00"

def now():
    return time.strftime(datetime_fmt, time.gmtime())

def make_url_xml(vars):
    """ assemble a single <url> xml fragment """
    return """\
<url>
  <loc>%(base)s%(url)s</loc>
  <lastmod>%(lastmod)s</lastmod>
  <changefreq>%(changefreq)s</changefreq>
  <priority>%(priority)s</priority>
</url>
""" % vars
    
def sitemap_url(request, base, page):
    """ return a sitemap <url>..</url> fragment for page object <page> """
    url = page.url(request)
    pagename = page.page_name
    lastmod = page.mtime_printable(request)
    if lastmod == "0": # can happen in case of errors
        lastmod = now()

    # page's changefreq, priority and lastmod depends on page type / name
    if pagename in [u"RecentChanges", u"TitleIndex", ]:
        # important dynamic pages with macros
        changefreq = "hourly"
        priority = "0.9"
        lastmod = now() # the page text mtime never changes, but the macro output DOES

    elif pagename in [request.cfg.page_front_page, ]:
        # important user edited pages
        changefreq = "hourly"
        priority = "1.0"

    elif wikiutil.isSystemPage(request, pagename):
        # other system pages are rather boring
        changefreq = "yearly"
        priority = "0.1"

    else:
        # these are the content pages:
        changefreq = "daily"
        priority = "0.5"

    return make_url_xml(locals())

def execute(pagename, request):
    _ = request.getText
    form = request.form
    request.user.datetime_fmt = datetime_fmt
    base = request.getBaseURL()

    request.http_headers(["Content-Type: text/xml; charset=UTF-8"])

    # we emit a piece of data so other side doesn't get bored:
    request.write("""<?xml version="1.0" encoding="UTF-8"?>\r\n""")

    result = []
    result.append("""<urlset xmlns="http://www.google.com/schemas/sitemap/0.84">\n""")
    
    # we include the / url as an important and often changed URL
    result.append(make_url_xml({
        'base': base,
        'url': '/',
        'lastmod': now(), # fake
        'changefreq': 'hourly',
        'priority': '1.0',
    }))

    # Get page dict readable by current user
    pages = request.rootpage.getPageDict()
    pagelist = pages.keys()
    pagelist.sort()
    for name in pagelist:
        result.append(sitemap_url(request, base, pages[name]))

    result.append("""</urlset>\n""")

    result = "".join(result)
    result = result.replace("\n", "\r\n") # text/* requires CR/LF

    # emit all real data
    request.write(result)

    raise MoinMoinNoFooter

